Electromagnetic driving mechanism, camera module and electronic device

Abstract

An electromagnetic driving mechanism, a camera module, and an electronic device are provided. The electromagnetic driving mechanism includes a first metal plate, a second metal plate, at least one coil, at least one magnetic element, and at least one actuating assembly. The second metal plate is disposed opposite to the first metal plate. The at least one coil and the at least one magnetic element are stacked between the first metal plate and the second metal plate. The at least one actuating assembly is disposed on the first metal plate and connected to the at least one coil, and the at least one actuating assembly is configured to support the imager.

What is claimed is: 
     
         1 . An electromagnetic driving mechanism, applied to a camera module comprising an imager, comprising:
 a first metal plate;   a second metal plate disposed opposite to the first metal plate;   at least one coil;   at least one magnetic element, wherein the at least one coil and the at least one magnetic element are stacked between the first metal plate and the second metal plate; and   at least one actuating assembly disposed on the first metal plate and connected to the at least one coil, wherein the at least one actuating assembly is configured to support the imager;   wherein the at least one coil is driven by an Ampere force to move with respect to the at least one magnetic element within a magnetic field of the at least one magnetic element after being energized, thereby driving the at least one actuating assembly to deform to drive the imager to move.   
     
     
         2 . The electromagnetic driving mechanism according to  claim 1 , wherein the at least one actuating assembly comprises a motion control component and a flexible electrical connector;
 the motion control component is connected to the at least one coil and the first metal plate, the motion control component is configured to deform and move within a plane parallel to the first metal plate and is limited from moving out of the plane;   the flexible electrical connector is connected to the motion control component;   the at least one coil is fixedly connected to two ends of the motion control component; and   the at least one coil drives the motion control component to at least partially deform to drive the imager to move.   
     
     
         3 . The electromagnetic driving mechanism according to  claim 2 , wherein the flexible electrical connector comprises a wire portion main body, a first connecting portion, and a second connecting portion;
 the first connecting portion is connected to a first side of the wire portion main body and is connected to the motion control component; and   the second connecting portion is connected a second side of the wire portion main body and is disposed opposite to the first connecting portion.   
     
     
         4 . The electromagnetic driving mechanism according to  claim 3 , wherein the motion control component comprises two first moving portions, a second moving portion, at least one elastic portion, and a fixing portion;
 the two first moving portions are respectively disposed at two ends of the wire portion main body in a length direction of the wire portion main body;   the second moving portion is connected to the first connecting portion and is configured to support the imager;   the at least one elastic portion is disposed at a periphery of the second moving portion and is connected to the first connecting portion;   the fixing portion is disposed on the at least one elastic portion and is fixedly connected to the first metal plate; and   the two first moving portions, the second moving portion, and the imager move along with the at least one coil, and the at least one elastic portion is configured to elastically deform.   
     
     
         5 . The electromagnetic driving mechanism according to  claim 4 , wherein the first connecting portion is electrically connected to the imager via wire bonding. 
     
     
         6 . The electromagnetic driving mechanism according to  claim 5 , wherein the first metal plate defines at least one first slot, the at least one first slot penetrates through the first metal plate in a thickness direction of the first metal plate. 
     
     
         7 . The electromagnetic driving mechanism according to  claim 6 , wherein the electromagnetic driving mechanism further comprises a circuit board;
 the circuit board is disposed opposite to the first metal plate and is disposed at one side of the first metal plate away from the second metal plate; and   the second connecting portion is electrically connected to the circuit board via the wire bonding.   
     
     
         8 . The electromagnetic driving mechanism according to  claim 7 , wherein the first metal plate further defines at least one second slot, the at least one second slot is defined closer to an edge of the first metal plate than the at least one first slot; and
 the second connecting portion is electrically connected to the circuit board through the at least one second slot via the wire bonding.   
     
     
         9 . The electromagnetic driving mechanism according to  claim 4 , wherein the at least one coil spans across the flexible electrical connector and is disposed on the two first moving portions. 
     
     
         10 . The electromagnetic driving mechanism according to  claim 4 , wherein the at least one elastic portion comprises a first sub-elastic portion and a second sub-elastic portion, the first sub-elastic portion is connected to the second-sub elastic portion. 
     
     
         11 . The electromagnetic driving mechanism according to  claim 10 , wherein the first sub-elastic portion is bent and connected to the second sub-elastic portion. 
     
     
         12 . The electromagnetic driving mechanism according to  claim 2 , wherein at least four actuating assemblies are provided, the at least four actuating assemblies comprise at least four motion control components, a plurality of magnetic elements are provided and are divided into at least two groups of magnetic elements, and at least two coils are provided. 
     
     
         13 . The electromagnetic driving mechanism according to  claim 12 , wherein each of the at least two groups of magnetic elements is disposed corresponding to a corresponding one of the at least two coils; and
 each of the at least two groups of magnetic elements comprises two magnets disposed side by side or a single magnet.   
     
     
         14 . The electromagnetic driving mechanism according to  claim 13 , wherein first projections of each two magnets onto a plane parallel to a plane of the first metal plate are side by side, and second projections of each two magnets onto a plane perpendicular to the plane of the first metal plate completely overlap. 
     
     
         15 . The electromagnetic driving mechanism according to  claim 13 , wherein on the plane parallel to the plane of the first metal plate, a first projection of each of the at least two coils falls within a first projection of a corresponding one of the at least two groups of magnetic elements; and
 on the plane perpendicular to the plane of the first metal plate, a second projection of each of the at least two coils is parallel to a second projection of the corresponding one of the at least two groups of magnetic elements.   
     
     
         16 . The electromagnetic driving mechanism according to  claim 15 , wherein on the plane parallel to the plane of the first metal plate, a center point of the first projection of each of the at least two coils overlaps a center point of the first projection of the corresponding one of the at least two groups of magnetic elements. 
     
     
         17 . The electromagnetic driving mechanism according to  claim 13 , wherein four motion control components are provided, the four motion control components are disposed on the first metal plate, the four motion control components are centered on the imager and are respectively disposed at opposite sides of the imager. 
     
     
         18 . The electromagnetic driving mechanism according to  claim 17 , wherein the four motion control components are integrally formed. 
     
     
         19 . The electromagnetic driving mechanism according to  claim 17 , wherein four groups of magnetic elements are provided, the four groups of magnetic elements are disposed at a periphery of the four motion control components at intervals along a circumferential direction of the four motion control components. 
     
     
         20 . The electromagnetic driving mechanism according to  claim 17 , wherein four coils are provided, the four coils are respectively connected to the four motion control components. 
     
     
         21 . The electromagnetic driving mechanism according to  claim 2 , wherein the motion control component and the flexible electrical connector are integrally formed. 
     
     
         22 . The electromagnetic driving mechanism according to  claim 2 , wherein a material for preparing the motion control component and/or the flexible electrical connector comprises a silicon wafer. 
     
     
         23 . The electromagnetic driving mechanism according to  claim 1 , wherein the at least one magnetic element is connected to the second metal plate, the second metal plate, the at least one magnetic element, and the at least one coil are stacked in sequence; or the at least one magnetic element is connected to the first metal plate, the second metal plate, the at least one coil, and the at least one magnetic element are stacked in sequence. 
     
     
         24 . A camera module, comprising:
 a lens assembly configured to collect light;
 an electromagnetic driving mechanism; 
 a gyroscope configured to detect vibration of the lens assembly; and 
 an imager disposed on at least one actuating assembly of the electromagnetic driving mechanism; 
 wherein the electromagnetic driving mechanism comprises: 
 a first metal plate; 
 a second metal plate disposed opposite to the first metal plate; 
 at least one coil; 
 at least one magnetic element, wherein the at least one coil and the at least one magnetic element are stacked between the first metal plate and the second metal plate; and 
 the at least one actuating assembly disposed on the first metal plate and connected to the at least one coil, wherein the at least one actuating assembly is configured to support the imager; 
 wherein the at least one coil is driven by an Ampere force to move with respect to the at least one magnetic element within a magnetic field of the at least one magnetic element after being energized, thereby driving the at least one actuating assembly to deform to drive the imager to move; 
 wherein in response to the vibration of the lens assembly, the at least one actuating assembly drives the imager to move in a direction opposite to a vibration direction of the lens assembly. 
   
     
     
         25 . An electronic device, comprising:
 a device main body; and   the camera module according to claim  24 ;   wherein the camera module is disposed on the device main body.